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The American robin rejects cowbird eggs, so brood parasitism by the brown-headed cowbird is rare, and the parasite's chick does not often survive to fledging. [41] In a study of 105 juvenile robins, 77.1% were infected with endoparasites, Syngamus sp. being the most commonly encountered, in 57.1% of the birds. [42]
The first recorded use of robin egg blue as a color name in English was in 1873, [3] though earlier references in English to colors similar to that of robin's eggs were made as early as 1844. [4] The "robin's egg" glaze appeared during the Yongzheng Emperor’s reign (1722-35) in China, and Yixing potter Hua Fengxiang made works with "robin's ...
Egg incubation is the process by which an egg, of oviparous (egg-laying) animals, develops an embryo within the egg, after the egg's formation and ovipositional release. Egg incubation is done under favorable environmental conditions, possibly by brooding and hatching the egg.
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Deep cup nest of the great reed-warbler. A bird nest is the spot in which a bird lays and incubates its eggs and raises its young. Although the term popularly refers to a specific structure made by the bird itself—such as the grassy cup nest of the American robin or Eurasian blackbird, or the elaborately woven hanging nest of the Montezuma oropendola or the village weaver—that is too ...
While flight was being enhanced in evolutionary stages, lack of parental care meant that the increasing number of large eggs required a higher level of investment. This created young that were able to take flight shortly after hatching which is known as precocial, in the form of unassisted paternal (male only) care.
When the eggs are laid, the female will sit on them to keep them warm until they hatch, after about 18 days. Then both parents will help to feed the chicks. Young robins stay in the nest for about 23 days after hatching, but even after leaving the nest the parents will continue to feed them until they are about 65 days old.
If the eggs happen to hatch, the parents will immediately start feeding them fish and keeping them warm. If the eggs don't hatch, the parents will slowly start leaving the eggs a little bit at a time.